This is an ASUS smartphone, the ZenFone 4 Max (ZC520KL), which was popular for its large-capacity battery. Released in 2017, it was known as the "Battery King" at the time for its stamina. As an entry-level model, it also features a dual camera and a triple slot. Its main features are a 4,100mAh battery and a triple slot that allows the use of two SIM cards (DSDS) and a microSD card simultaneously. *Recommended as a sub-device for basic operations such as calls and browsing.* Model Number: ZC520KL Screen Size: 5.2 inches RAM (Memory): 3GB Storage (ROM): 32GB External Storage: microSD (up to 256GB) Camera: Dual lens (Main 13MP + 5MP, In-camera 8MP) Battery Capacity: 4,100mAh OS: Android 7.1 (Can be manually updated to 8.1) SIM-free (nanoSIM compatible) 【Condition】 Operation confirmed (startup, charging, Wi-Fi, camera OK) Touch panel response is good 【Accessories】 Body only (SIM card and microSD card not included) 【Please Note】 ・Although this model's final version is Android 8.1, automatic distribution has ended due to the time elapsed since its release. To update to 8.1, you need to download the update file from the ASUS official website and apply it manually. ・Some apps (e.g., YouTube, LINE, etc.) may not be updated or used. YouTube can be viewed from the browser (m.youtube.com). 【Recommended Uses】 Dedicated phone and SMS terminal For video and music playback (via browser) Sub-smartphone for children, the elderly, car navigation, Wi-Fi terminals, etc. (Not suitable for those seeking the latest apps) *Since a protective film and case were applied to the screen immediately after purchase, there are no external problems.* ■Please understand that no claims, no returns, price negotiations, and post-purchase support are not available. ■Please read the product description and purchase only if you understand it. ■Shipped via Yu-Packet Post mini. #ASUS #ZenFone4Max #ZC520KL #SIMFree #SubSmartphone #Android #AppRestriction